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arXiv 1106.3689astro-ph.HE
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天鹅座X-1黑洞的质量

The Mass of the Black Hole in Cygnus X-1

Jerome A. Orosz, Jeffrey E. McClintock, Jason P. Aufdenberg, Ronald A. Remillard, Mark J. Reid, Ramesh Narayan, Lijun Gou

摘要:

天鹅座X-1是一个双星系统,由一个黑洞和一个在紧密轨道上的巨大伴星组成。基于我们在前一篇论文中报道的精确距离测量,我们首先确定伴星的半径,从而限制了双星系统的规模。为了获得一个完整的动力学模型的二进制,我们使用广泛收集的光学光度和光谱数据取自文献。通过使用所有可用的观测约束,我们表明,轨道略有偏心(径向速度和光度数据独立地证实了这一结果),伴星旋转大约1.4倍的伪同步值。我们发现一个黑洞质量为M =14.8 \pm 1.0 M_{\sun},一个伴星质量为M_{opt} =19.2 \pm 1.9 M_{\sun},轨道平面与我们视线的倾角为i=27.1 \pm 0.8度。

英文摘要:

Cygnus X-1 is a binary star system that is comprised of a black hole and a massive giant companion star in a tight orbit. Building on our accurate distance measurement reported in the preceding paper, we first determine the radius of the companion star, thereby constraining the scale of the binary system. To obtain a full dynamical model of the binary, we use an extensive collection of optical photometric and spectroscopic data taken from the literature. By using all of the available observational constraints, we show that the orbit is slightly eccentric (both the radial velocity and photometric data independently confirm this result) and that the companion star rotates roughly 1.4 times its pseudosynchronous value. We find a black hole mass of M =14.8\pm1.0 M_{\sun}, a companion mass of M_{opt}=19.2\pm1.9 M_{\sun}, and the angle of inclination of the orbital plane to our line of sight of i=27.1\pm0.8 deg.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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